Wrightsock&';s new Racer offers the Wright Fit with every step. With precise anatomical design, lightly cushioned heel and toe, and more technical features in every inch of this design the Racer is the perfect choice for running, walking or trail blazing. The Racer Single-Layer Double Tab Features: WrightFit contoured foot design for that perfect fit Made with recycled yarns Seamless Toe Moisture management yarns Ventilated mesh top for added breathability Light cushion foot padding for extra protection Running Sock Fiber Content: 68% Recycled Polyester, 24% Nylon, 8% Lycra These single-layer running socks are composed mostly of eco-friendly Recycled Polyester. Recycled Polyester materials are made from recycled plastic bottles, helping you enjoy blister-free running adventures while protecting the ground beneath your feet. RUNNING SOCK SIZING GUIDE Finding the right fit is essential for blister prevention! You can view our sizing chart below. We invite you to contact us for any additional information or head to our FAQ page to find the answers to common customer questions. As an American-made, family-owned business, we thank you for choosing Wrightsock single-layer running socks.